Showing posts with label Yellow-billed Cuckoo. Show all posts
Showing posts with label Yellow-billed Cuckoo. Show all posts

Thursday, June 13, 2019

Yellow-billed Cuckoo

I added the 174th bird species to my local south Florida "Wounded Wetlands" patch list on May 23, a pair of Yellow-billed Cuckoos. This was the second new species for 2019, following the Chuck-will's-widow which I first heard on April 20. Although the cuckoo is not a rare breeding bird over the eastern half of the lower 48 states, it is dispersed and secretive. Its very distinctive call betrayed its presence, but I obtained only fleeting looks and few photographs. 

My first photo was terrible, yet diagnostic for reporting purposes. I finally caught it on May 29 as it peeked out from behind the dense foliage:

Yellow-billed Cuckoo 02-20190529

My initial open shot was on May 31, when one called from the branches of a dead tree not far away. It was badly back-lit. Note its yellow bill and the six distinctive white spots under its long tail:

Yellow-billed Cuckoo 01-20190531

Yellow-billed Cuckoo 03-20190531

On June 1 I snapped a couple of poor photos from far away as it appeared briefly and then launched into flight. We have only two cuckoo species in the USA, the Yellow-billed and the Black-billed Cuckoo. The second photo illustrates the chestnut reddish brown flight feathers which also distinguish it from the Black-billed species:

Yellow-billed Cuckoo 01-20190601

Yellow-billed Cuckoo 02-20190601

On June 4 I followed one along a row of trees until finally getting a rather distant shot. Luckily, the sunlight was nearly perfect to show off its wing feathers:

Yellow-billed Cuckoo 02-20190604

Look closely at its toes and see that, like all cuckoos (as well as owls and woodpeckers), it has zygodactyl feet, with two toes pointing forward and two to the back:

Yellow-billed Cuckoo 04-20190604

Our cuckoos are related to the European Common Cuckoo which is an obligate brood parasite, meaning that it must lay its eggs in the nests of other species in order to reproduce. Both of the New World cuckoos are facultative brood parasites which sometimes do this but mainly build and tend their own nests and eggs.

Yellow-billed Cuckoos are declining in number, especially those in the western US which are classified as Threatened under the Endangered Species Act. They no longer breed in British Columbia, and the California population of breeding pairs has declined from 15,000 to only about 40 pairs in less than a century.

My first encounter with the Yellow-billed Cuckoo was as a kid in New Jersey. I saw it eating tent caterpillars and later found its nest. It contained eggs, which I photographed with a Brownie box camera and waited anxiously for the roll of film to be developed. They were out of focus and I cannot remember whatever came of them.

These are photos of the Black-billed Cuckoo which I took in NE Illinois in May, 2011:

Black-billed Cuckoo 3-20110516

Black-billed Cuckoo (Coccyzus erythropthalmus ) 4-20110516

This is the trail along the canal where I have seen the cuckoos, just after sunrise on June 6:

Levee trail 02-20190606

Note the storm clouds on the horizon. We have settled into the summer pattern of hot and humid mornings followed by afternoon showers and thunderstorms. Cuckoos have been called "rain crows" as they are said to be more vocal on cloudy days. Indeed, this was the scene from our back yard on June 3, one of the days I heard it calling:

Back yard Rainbow 01-20190601
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